package com.gc.gc.code.controller;

import com.gc.gc.code.utils.CodeUtil;
import com.google.code.kaptcha.Constants;
import com.google.code.kaptcha.Producer;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;

import javax.imageio.ImageIO;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import java.awt.image.BufferedImage;
import java.io.IOException;

@Controller //验证码控制层
public class CodeController {
    @Autowired
    private Producer captchaProducer=null;

    @RequestMapping("/login/kaptcha")
    public void getKaptchaImage(HttpServletRequest request, HttpServletResponse response) throws IOException {
        HttpSession session = request.getSession();
        response.setDateHeader("Expires", 0);
        response.setHeader("Cache-Control", "no-store, no-cache, must-revalidate");
        response.addHeader("Cache-Control", "post-check=0, pre-check=0");
        response.setHeader("Pragma", "no-cache");
        response.setContentType("image/jpeg");
        //生成验证码
        String capText=captchaProducer.createText();
        session.setAttribute(Constants.KAPTCHA_SESSION_KEY,capText);
        //向客户端写出
        BufferedImage bi = captchaProducer.createImage(capText);
        ServletOutputStream out = response.getOutputStream();
        ImageIO.write(bi, "jpg", out);
        try {
            out.flush();
        } finally {
            out.close();
        }
    }

    //跳转页面  跳转到测试页面 也就是有验证码的页面
    @RequestMapping("/jst/t1")
    public String toT1(){
        return "/justify/t1";
    }

    //调用工具类判断验证码的正确性
    @RequestMapping("/check")
    public String test(HttpServletRequest request){
        CodeUtil.checkVerifyCode(request);
        return "/justify/t1";
    }
}
